package com.gdzl_hadoop.util;

import org.apache.commons.lang3.StringUtils;
import org.joda.time.DateTime;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;

import java.util.Date;

/**
 * Created by 1032019725 on 2017/9/7.
 */
public class DateTimeUtil {
    //joda-time
    //提供2个方法，str->date  date->str

    private static String   STANDARD_FORMAT="yyyy-MM-dd HH:mm:ss";

    /**
     *
     * @param dateTimeStr
     * @param formatStr
     * @return
     */
    public  static Date strToDate(String dateTimeStr,String formatStr){
        DateTimeFormatter   dateTimeFormatter   = DateTimeFormat.forPattern(formatStr);
        DateTime    dateTime    =   dateTimeFormatter.parseDateTime(dateTimeStr);
        return dateTime.toDate();

    }
    public  static Date strToDate(String dateTimeStr){
        DateTimeFormatter   dateTimeFormatter   = DateTimeFormat.forPattern(STANDARD_FORMAT);
        DateTime    dateTime    =   dateTimeFormatter.parseDateTime(dateTimeStr);
        return dateTime.toDate();

    }

    public static String dateToStr(Date date,String formatStr){
        if(date==null){
            return StringUtils.EMPTY;
        }
        DateTime    dateTime    =   new DateTime(date);
        return dateTime.toString(formatStr);
    }
    public static String dateToStr(Date date){
        if(date==null){
            return StringUtils.EMPTY;
        }
        DateTime    dateTime    =   new DateTime(date);
        return dateTime.toString(STANDARD_FORMAT);
    }



}
